Openwork-stitching machine.



w. R. McMURRAY. OPENWORK STITCHING MACHINE.

ATION FILED NOV 12 l i 1,1 84,256. I Patented May 23,1916.

2 EEEEEEEEEEEE l- W. R. McMURRAY.

OPENWORK STITCHING MACHINE.

APPLICATION F lLED NOV. 12, 1913.

1,184,256. Patented May 23,1916.

' 2 SHEETS-SHEET 2.

-'WILLI AM RICI-IEY MCMURRA'Y, OF BELFAST, IRELAND.

OPENWORK-STITCHING MACHINE.

Specification of Letters Patent- Patented May 23, 1916.

Application filed November 12, 1913. Serial No. 800,489.

To all whom it may concern.

Be it known that I, WILLIAM RIcHnY Mo- MURRAY, a subject of the King of Great Britain, residing at'Belfast, Ireland, have invented certain new and useful Improvements in Openwork-Stitching Machines, of which the following is a specification.

This invention relates to the production of open work stitching such as the well known shire, spoke, or like stitching. At present it is usual to either draw the threads by hand and then effect the sewing operation or to employ a sewing machine having a punch or spreader, this punch or spreader moving in a vertical path either along with or independently of theneedle or needles.

Under my invention I provide on or attach to the sewing machine for doing openwork stitching and which may be of the usual well known Wheeler & Wilson, Singer, or other suitable construction, spreader blades so arranged and operated that they perform a combined vertical movement and also a lateral movement, the blades entering the fabric and pushing the threads thereof apart in such manner as to obviate the necessity for pulling or drawing a number of threads or for using punches or spears as at present. advance of the needles and positively push aside the threads. v

In order that the invention may be properly understood I havejhereunto appended explanatory sheets of drawings,'whereon I have shown, by way of example, different ways of carrying out the invention.

on the drawings: Figures 1, 2 and 3, show one arrangement, in front elevation at Figs. 1 and 2, and 1n side elevation at Flg. 3. In

Fig. 1 the spreader blades are shown closed and in Fig. 2 they are shown open. Figs. 4 and 5 show another arrangement in front and sideelevation. Fig. 5? shows a battery of spreader blades and Fig. 5 shows how the blades enter the cloth. Fig. 6 shows a third arrangement in front elevation and Fig. 7 a

sectional detail of part of this arrangement.

Figs. 8 and 9 show a fourth arrangement in front and side elevation respectively.

Referring to the drawings whereon the same reference letters, wherever repeated, indicate the same or similar parts: A is the The blades are arranged in In the arrangement shown at Figs. 1 to 3,

the machine has a pair, or one or more pairs, of spreaders or spreader blades a, 6, arranged to operate in the manner of a pair of scissors, these spreadersbeing pivotally secured at c to the block cl of the needle bar and in advance of the ordinary vibrating needles 0, In this arrangement each spreader, or, if desired, battery of spreaders, 1s provided with an extension a 6 and these extensions may be flat or of rectangular section for the whole 'or part of their length and are connected together, at their upper ends, by means of a spiral spring g n such manner that they are normally held in the closed position, as at Fig. 1, under the actlon of the said spring. The extensions a 5 are provided with cam pieces a b adapted to engage'and work on a wedge block it on the head A of the sewing ma chine. The block it is adjustable vertically and for this purpose is provided with slots k and screws 2'. adjusted the screws, which pass into the head, are tightened up so. that the block is held rigidly in position. The pivot pin 0 is made one with the plate 0 which latter may bedetachably secured to the block cl. With this arrangement, when the vibrating needles of the sewing machine are out of the cloth and in their up position, the spreader blades a, b, are also raised up out of the cloth and assume the position shown in Fig. 1, but, on the downstroke of the needle bar B, after the spreader blades have entered the cloth, the cam pieces a 6 engage the wedge block 72. and force the blades apart in the manner shown at Fig. 2 so that the blades positively push aside the threads in the cloth. The block it is, or may be, made, as shown, so as to retain the spreader blades in the open position not only while in the cloth onv the downstroke but also during part of the upstroke of the needle bar.

In the arrangement shown at Figs. 4 and 5 the extensions (1 b arenormally held close together by means of a spiral spring 9 as before and they are pushed apart by the ac-.

tion of a wedge mat the lower end of a bar m secured to a pivot pin m working in a bearing on the head which latter is slotted When the block has been for a short distance to allow movement of the bar m Secured also to the pin m is a bar a whose lower end is straight but whose upper end is angled, as shown at Fig. 5. On the needle bar 13 is a roller 0 which is.

adapted to engage the bar it. A spiral spring 12 normally pulls the wedge m backward. With this arrangement, at each descent of' the needle bar B, the roller 0 acts on the in cline of the bar it and, consequently, forces; outward the wedge m and, as-this wedge" projects between the two extensions a?, 6 it forces them apart, and, consequently, opens the spreaders in the same manner as in the arrangement Figs. 1, 2 and 3. So long as the roller maintains contact with the straight part of the bar it the spreaders areinaintained in the open position. The wedge m may be of a conic shape as shown. a

In the arrangement shown at Fig. 6, the extensions a 6 are normally held closed by the action of the spring 9 and are opened at the proper times by means of a cam 9 carried on a spindle 9 (see Fig. suitably mounted in the head of the machine. On

this spindle, at the inner end thereof, is a.

spur pinion g which is capable of being engaged by a rack g carried onthe needle bar B. Vfith this arrangement, at each de scent of the needle bar, the cam g which is of elliptical shape,is turned sufliciently to I push apart the extensions a 6 and open out the spreader blades.

' V In the arrangement shown at Figs. 8 and 9, the extensions a N, are forced apart by a tonic wedge m as before, and are closed by a spring 9 as before but, in this case,the

. wedge m is suitably moved outwardbat the propertimes. The spreader blades are, as shown, preferably, made slightly longer than the usual .Vibrating'needles so as to enter the cloth before the same. It may befound desirable to provide more than one blade or" .spreader on each movable arm a 6 for example as shown at'Fig. 5 where each arm carries three spreader blades and they would, f 7 preferably, be so. pitched relatively to the feed of the fabric that the two sets: of

spreader blades will enter consecutivelyinto alternate spaces between the threads atleach,

spreading operation after each forward feed of the fabric (see Fig. 5 which shows the spreader blades in full lines as at-the end .of one stitching operation and in dotted lines j tion).

as at the end of the next stitching opera- Havingnow fully what I claim and desire to secure by Letters Patentis:

1. The combination, with a sewing machine having a needle bar, a needleor needles attachedto said, needle bar, and. means for operating same,v of automatically acting and laterally moving meansarranged on.

said needle'bar and in advance of said neechine havin a 'vib'rating needle orneedles and means for operating same, of spreaderblades movably arranged in advance ofasa'id v, needle or; needles, {means for movingzthe bladeslaterally apart and means for bringing the spreader blades together.

described my invention,

dle or needles, for positively opening out the threads of the fabric before the same is sewn.

-2.,The combination, with a sewing inach ne having a vibrating needle or needles and means for operatingsame, of automatically acting and laterally moving blades aradvance of said needle or needles, for positively opening out the threads of the fabric before the same is sewn.

4. The combination, with .a sewing macally acting and laterally and vertically chine having a vibrating needle or needles and means for operating-same," of automatimoving blades arranged in advance of said needle or needles and adapted to positively open out thethreads of same is sewn. V

5. The combination, with a s'ewingma the fabric, before the a chine having a needle bar, a needle or needles attached to saidneedle bar, and means for operatingsame, of automatically acting and laterally 'moving thread spreading blades mounted on said needle bar andmov' 7 ing therewith inadvance of said needle oiij needles.

6. The combination, with a sewing ma-. chine having a needle bar, a needle or needle bar, automatically acting and laterally moving thread spreading blades mounted on said block. and moving therewith in ad vance of said needle or needles; 1 1.7. The combination, with a sewing ina- U 8. The c'ombination, with a sewingpma idles attached to said needle bar, and means for operating same, of a block on said neechine having a vibrating needle or'needles and means foroperatinggsaine, of a pairof spreader. blades arranged in line and inad-V vance of said needle for needles and'means.

9. Thecombination, with asewing machine having a needle bar, a needle or Me; dles attached-to said needle bar, and fmeans for operating same,fof apa'ir of spreader blades'arranged 011 S1ld needle-bar and in advance of said needle or needles and means for vibratin -the'spreader blades laterally, Y

10. The combination, with a sewing machine having a vibrating needleor needles for vibrating the'spreader blades laterally. V

and means for operating same, of a pair of spreader blades arranged in line and in advance of said needle or needles and means for moving the spreader blades apart from one another at intervals.

11. The combination, with a sewing machine having a needle bar, a needle or needles attached to said needle bar, and means for operating same, of a pair of spreader blades movably carried on said needle bar in advance of said needle or needles, extensions on th spreader blades, means acting on the extensions for forcing the blades laterally apart and means for bringing the blades together again.

12. The combination, with a sewing machine having a needle bar, a needle or needles attached to said needle bar, and means for operatingsame, of a pair of spreader blades movably carried on said needle bar in advance of said needle or needles,-extensions on the spreader blades, means acting on the extensions for forcing the blades laterally apart and means acting on the extensions for bringing the blades together again.

13. The combination, with a sewing machine having a needlebar, a needle or needles attached to said needle bar, and means for operating same, of a pair of spreader blades pivotally carried onv said needl bar in advance of said needle or needles,'extensions on the spreader blades, means acting on the extensions for forcing the blades laterally apart and means for bringing the blades together again.

14. The combination, with a. sewing machine having a needle bar, a needle or nee-' dles attached to said bar and means for operating same, of a pair of spreader blades pivotally carried on the needle bar in advance of said needle or needles, extensions onthe spreader blades, a wedge acting on the extensions for forcing the blades laterally apart and a spring for bringing the blades together again.

15. The comb nationtwith a sewing machine having a needle bar, a needle or needlesattached to said bar and means for operating same, of a pair of spreader blades pivotally carried on the needle bar in advance of said needle or needles, extensionson the spreader blades, an adiustable wedge acting on the extensions for forcing the blades laterally apart and a spring for bringing the blades together again.

16. The combination, with a sewing machine having a needle bar, a needle or needles attached to said bar and means for operating same, of a pair of spreader blades movably carried on the needle bar in advance of said needle or needles, extensions on the spreader blades, means acting on the extensions for forcing the bladeslaterally apart and elastic means for bringing the blades together again.

17. The combination, with a sewing machine having a needle bar, -a needle or needles attached to said needle bar, and means for operating same, of a pair of spreader blades movably carried on said needle bar one in advance of the other and both in advance of said needle or needles, extensions on the spreader blades, means acting on the extensions for forcing the blades laterally apart and means for bringing the blades together a gain.

18. The combination, with a sewing machine having a needle bar, a needle or needles attached to said, needle bar, and means for operating same, of a pair of spreader blades movably carried on said needle bar one in advance of the other and both in advance of said needle or needles, extensions on the spreader blades, means, acting on the extensions for forcing the blades laterally out of line and means for bringing the blades again into line.

19. The combination, with a sewing machine having a needle bar, a needle or needles attached to said needle bar, and means for operating same, of a pair of spreader blades movably carried on the said needle bar in advance of said needle or needles, extensions on the spreader blades, means acting on the extensions for forcing the blades at intervals laterally apart and means for bringing the blades together again.

20. The combination, with a sewing machine having a needle bar, a needle or needles attached to said needle bar, and means for operating same, of a pair of spreader blades r'emovablv fitted on said needle bar in advance of said needle or needles, extensions on the spreader blades, means acting on the extensions for forcing the blades lat- 7 erally apart and means for bringing the blades together again.

21. The combinat on with a sewing machine having a needle bar, a vibrating needle or needles attached to said needle bar and means for operating same. of means for opening out the threads of the fabric arranged on the needle bar in advance of the needle or needles and adapted to be moved vertically therewith and laterally independently of the vibrating movement thereof.

In testimony whereof I atfix my signature in presence of two witnesses.

WILLIAM RICHEY MOMURRAY. Witnesses 7 ANDREW HAMILT N, HARRY VVALTER ALLsoPP.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D; G. 

